{
volScalarField alphaEff_0_71("alphaEff_0_71",turbulence->nu()/Pr_0_71);

fvScalarMatrix TEqn_0_71
(
fvm::ddt(T_0_71)
+ fvm::div(phi, T_0_71)
- fvm::laplacian(alphaEff_0_71, T_0_71)
+ U.component(0)*gamma_0_71     //if your flow is periodic in y or z directions, e.g. component(1) or  //component(2).
);

TEqn_0_71.solve();
}
